Compressor mounting



June 28, 1927. 1,633,765

, N. A. CHRISTENSEN I COMPRESSOR MOUNTING 4 Filed Nov. 9, 1925 2 heets-Sheet 1 O INVEINTOR.

A TTORNE Y.

' I v 1,633,765 June N. A.'CHRISTENSEN COMPRESSOR MOUNTI NG Filed New 9, 192.5 2 Sheets-Sheet 2 INVEN TOR.

AT ORNEY.

Patented June 28, 1921.

UNITED STATES I A I 1,633,765 PATENT OFFICE.

K1318 A. CHRISTENSEN, OF IILWAUKEE, WISCONSIN.'

OOIPRESBOB MOUNTING.

Application filed November 9, 1925. Serial m. 87,928.

gine, with provision for inspecting the bear-' ings of the compressor upon removal of the compressor cylinder and sald cover plate,

and more particularly to provide certain modifications over the construction shown in my copending application Serial No. 47,933, filed August 3, 1925.

The invention further consists in the several features. hereinafter set forth and more particularly defined by claims at the conclusion hereof.

In the drawings, Fig. 1 is a front elevation view of an automotive engine equipped with apparatus embodying the invention;

Fig. 2 is a detail vertical sectional view taken on the line 2-2 of Fig. 1;

Fig. 3 is an enlarged view of a portion of the front cover plate. with the compressor parts shown in a section taken along the line- 3-3 of Fig. 2:

Fig. 4 is a detail sectional view taken on the line 4-4 of Fig. 2, with the piston and front end of the crank shaft omitted.

In the drawings the numeral 5 designates an internal combustion engine of the automotive type, in which the timing gears for the cam shaft drive and other gears for the generator drive and the fan are mountedat the front end of the crankcase 6 of the engine within a housing formed by the engine crankcase and the removable front cover plate 7 which is secured to the crankcase by bolts 7. According to the present invention, the front cover plate 7 is specially designed to form the crankcase 8 of the compressor, and has a mounting pad or portion 9 formed thereon to support the cylinder 10 of the compressor. A front extension 11 of the crank shaft of the engine extends through the housing or crankcase into a recess 12 in the front end trunnion bearing 13 of the engine. The main bearing 14 for the forward crank throw of the engine crank shaft is within the engine crankcase. proper:

- sha adjacent the front cover plate and a portion of said bearing is shown in Fig. 2. i

The front end of thecrankcase of the engine is specially designed to rovide a pad or face portion 15 against which the compressor cylinder supporting flange 16 of the cover plate abuts. The compression cylinder 10 has a flanged base 17 which at its rear edge 18 also abuts against the pad. portion 15 and forms a tight joint therewith. The flanged base 17 is provided with bolt .holes through which the hold-down bolts 19 pass into tapped holes 20 in the pad portion 9 of the front cover plate. The holes in the base 17 for the bolts 19 are large enough so as to permit a slight lateral movement of the base 17 relative to the pad 9, during assembly, so that just before the bolts 19 are finally tightened up the base 17 may be moved laterally to bring its edge 18 against the pad portion 15 and maintain it in this position by means of bolts 21 having threaded engagement with a tap ed hole 21 in the flange 16, and provided with washers 22 engageable with the front face 23 of the base 17 and exerting pressure thereon. Thus. the cylinder 10 is removably secured to the pad 9 and abuts on one side of its base against the engine crankcase. w

A piston 24 works in the cylinder of the compressor and is operatively connected to the main extension 11 of the crank shaft 25 of the engine by means of a wrist-pin 26 and connecting-rod 27, with its adjustable big end-bearing 28 formed as an eccentric strap to fit over the crank pin 29 formed in the ex- -tension 11 which is keyed at 30 to the end of the crank shaft 25 and held against endwise movement by a screw 31 extending into .the'end of said shaft.

The inlet and exhaust valves of the compressor are not shown in detail, but may be of any suitable construction.

The pad portion!) of the front cover plate. has a bore 32 formed therein communicating with the crankcase 8 and a slot 33.

Withthis construction the piston 24 of the com ressor is driven by the engine crank to compress air in the compressor cylinder and-expel it to the reservoir. As the cylinder is removable independent of the coverplate, the piston rings and thewristpin may be readily inspected or removed, when desired, by taking off the cylinder 10. In case any adjustment or renewal'of the bigend-bearing of the connecting-rod 27 is necessary, the removal of the cylinder 10 permits the taking off or artial removal of the cover plate 7 by an en wise movement of said .late, and thus permits readyaccess to said ig end-bearing, the slot 33 preventing any interference between the connecting-rod and said plate during-its removal.

Inasmuch as the crankcase 8 of the compressor is an extension of the main crankcase of the motor, the lubricating system for the compressor may use the same lubricating oil as the motor, and the oil dripping or coming down from the walls of the compressor cylinder below the piston will serve.

to oil the big end of the connectin -rod and find its way into the crankcase of t 0 motor, and return to the main oil sump of the engine. As shown, the cylinder head of the compressor has a cooling space 34 into which the lubricating oil of the main en 'ne is forced and from which the oil flows t rough a passage 35 into the lower end of the cylinder and then to the crankcase 8. The oil from the passage 35 may flow into a recess 36 in the pad, 9 before dripping down into the crankcase, and the lower end of the piston moves down into this recess.

tion for sai and means for forcin I desire it to be understood that this invention is not to be limited to any specific form or arrangement of-parts except in so far as such limitations are specified in the claims,

What I claim as my invention is:

- 1. In an automotive type engine, the combination with the crankcase of the engine having a pad portion at its front end, of a detachable front cover plate having a part vforming the crankcase of an air compressor and a compr'essor-cylinder-supporting portion for said compressor, and a compressor cylinder having its base portion mounted on said cylinder-supporting portion of said front cover late and its rear edge abutting againsta sai pad portion of said engine crankcase.

2. In an automotive t pe engine the combination with the cran case of the engine having'a pad portion at its front end, of a detachable front cover plate having a part forming thecrankcase of an air compressor and a com 'ressor-cylinder-support'ing porcompressor, a compressor cylinder having its base portion mounted on said cylinder-supporting portion I of said front cover plate and its rear edge abutting a ainst said pad portion of said engine cra case, said rear edge into tight engagement wit said pad on" said engine crankcase and for maintaining it in this position.

3. In an automotive type engine, the combination with the crankcase of the engine having a pad portion at its front end, of a removable front cover plate secured to said crankcase and having a compressor crankcase portion into which the crank shaft of the engine extends, said cover plate also having a compressor-cylinder-supporting portion, a cylinder removably mounted on said supporting portion and having an edge forming a tight joint with said pad portion of said crankcase, a piston working in said cylinder, adriving connection between said piston and that portion of the crank shaft extending into said compressor crankcase, said supporting portion having an opening, covered by said cylinder, to accommodate said driving connection and to permit the removal of said cover plate upon the removal of said cylinder without disconnecting said driving connection.

4. In an automotive t bination with the cran case of the engine having a pad portion at its front end, of a detachable front cover plate having a part forming the crankcase of an air compressor and a com ressor-cylinder-su porting portion for sai compressor provided with a slot whose open end terminates at said pad portion, and a compressor cylinder having its base portion mounted on said cylinder-supporting portion of said cover plate and covering said slot with its rear edge abutting against said pad portion of the engine clrankcase to close off the open end of said s ot.

5. In an automotive type engine, the combination with the crankcase of the engine, of a removable one-piece front cover plate having a compressor crank case portion and a compressor-cylinder-supporting portion, a cylinder havin its base removably secured to said supporting portion, a

pe engine, the comiston working n said cylinder, an engmenven shaft, a

cylinder, for adjustment or tion of said big end bearing while said aring is associated with said shaft.

In testimon whereof, I afiix in si ature.

N IELS A. CHRIS'I EN. 

